Self-feeding rip-saw machine



(No Model.) Z'Sheets-Sheet 1. P. MODONOUGH.

. SELF FEEDING RIP SAW MAGHINE. No. 452,110. Patented May 12, 1891.

M 1 Frank M 'fiaaaza /z kNo Model.) 2 Sheets-Sheet 2. F. MoDONOUGH.

SELF FEEDING RIP SAW MACHINE. N0. 452,110. Patented May 12, 1891.

Tn: News PETERS co, wow-mum, wAsHmmaN, n o.

UNITED STATES PATENT OFFICE.-

FRANK MODONOUGH, OF EAU CLAIRE, lVISCONSIN.

SELF-FEEDING RIP-SAW MACHINE.

SPECIFICATION forming part of Letters Patent No. 452,110, dated May 12,1891.

Application filed March 22, 1889.

.To all whom it may concern.-

it known that I, FRANK MODONOUGH, a

c tizen of the United States, residing at the c1ty of Eau Olaire,in thecounty of Eau Claire and State of Wisconsin, have invented a new anduseful Improvement in Self-Feeding Rip- Saw Machines, of which thefollowing is a full descrlption, reference being had to the accompanyingdrawings. This invention relates to machines for sawlng or rippingboards or planks into strips of any desired. width for various purposes;and it has for its object to construct a machine of this class whichshall be simple and easily operated, andin which the speed of the feedmechanism may be conveniently manipulated while the machine is inmotion.

The invention consists in the improved construction, arrangement, andcombination of parts, which will be hereinafter fully described, andparticularly pointed out in the claim. In the drawings hereto annexed,Figure 1 s an end elevation of a machine constructed 1n accordance withmy invention, parts of the same having been broken away for the purposeof showing the construction more clearly. F1g. 2 is a side elevation ofthe same. Fig. 3 1s a detail view showing one end of a drivingshaft andthe sliding box in which the said shaft is mounted.

Like numerals of reference indicate like parts in all the figures of thedrawings.

In the frame of my improved machine, which is designated by 1, and whichmay be constructed of wood, iron, or other suitable material, isjournaled a shaft or arbor 2, carrying the saw 3. Said shaft or arborhas a pulley l, which is connected by a belt or band 5 with a drum 6upon the driving-shaft 7. One end of the latter is journaled in abox 8,in which it has a limited sliding movement. The other end of said shaftis mounted in a box 9, which is slidingly mounted upon a flangedsupporting-plate 10 in the frame of the machine. The portion of theshaft 7, which is journaled in the box 9, is slightly reduced indiameter, in order that the said shaft shall be moved with the box whenthe latter is adjusted upon its supporting-plate. Motion will betransmitted to the shaft 7 in any well-known manner from some suitableSerial No. 304,373. No model.)

source of power, and theiuuer end of the said shaft carries a frictionwheel or disk 11.

12 designates a shaft, which is mounted vertically in a suitable step 13and boxing 14 upon the frame 1. Mounted upon the'said shaft near itslower end is a hub 15, carrying a friction-wheel16,which maybeconstructed of or faced with wood, paper, orany other suitable material.The hub 15 is mounted slidingly upon the shaft 12, upon which it iskeyed by means of a feather or spline working in agrooveliin the saidshaft. The hub 15 has a revolving ring 18,provided withlaterally-extended studs 19, engaging slots 20, formed in a yoke 21 upona lever 22, whichis pivoted to the frame of the machine. Pivotallyconnected with the free end of the lever 22 is a rod 23, havingscrew-threaded portion 2st and provided at its upper end with a crank25. Said screw-threaded rod extends througha nut 26,which is pivotallyconnected with the frame of the machine. The screwthreaded rod 24 isswiveled in the rod or arm 23, so that the said screw-threaded rod maybe rotated in the nut 26, thus raising or lowering the free end ofthelever22,and thereby adjusting the friction-wheel 16 at a greater orless distance from the center of the disk 11, and consequentlyregulating the speed at which the shaft 12 will be rotated.

Upon the upper end of the shaft 12 is mounted a vertically-sliding box27, having a laterally-extending arm 28, the outer end of which has avertical screw-threaded perforation 29, through which extends an adjustingscrew 30, the upper end of which has a crank or handle 31 and thelower end of which bears against an arm or bracket 32, extending fromthe frame of the machine. A spring, as 33, may be coiled upon thefeed-screw below the arm 28, in order to assist in forcing the latter inan upward direction when desired. The sliding box 27 has alaterally-extending arm 34, in which is journaled ashaft 35, carrying afeed-saw or feed-wheel 36. The inner end of the shaft 35 has abevel-gear 37 meshing with a pinion 38. The latter, as well as thebevel-gear 37, is located within the box 27, and the said pinion 38,which is vertically adjustable with the said box, is keyed upon theshaft 12, which latter is provided with a vertical groove 39 toaccommodate the key and to admit of the vertically sliding movement ofthe pinion.

It will be readily understood that by manipulating the screw 30 theboxing carrying the shaft upon which the feedwheel is mounted may beadjusted vertically to accommodate lumber of any desired thickness, andthat such adjustment may be effected while the machine is in operation,as well as [O the adjustment of the friction-wheel 16,

whereby the speed of the shaft 12, and consequently the speed of thefeed mechanism, may be regulated.

Suitably pivoted to the frame of the ma- I5 chine at 40 is a bent arm orlever a1. Said lever is preferably mounted upon a rock-shaft having anupwardly-extending arm or pawl :2 engaging the under side of the slidingbox 9, in which one end of the driving-shaft T is journaled. Upon thehorizontal arm of the lever ll is mounted an adjustable weight t3, andthe free end of said lever has a pivoted handle-bar ll provided withteeth or notches -15, adapted to engage a yoke or stirrup 46, throughwhich the said handle-bar ext-ends. It will be seen that when thehandle-bar i4: is not in engagement with said stirrup the weight 1L3will tend to throw the shaft 7 in the direction of the shaft 12, thusholding the friction-disk 11 in contact with the wheel 16 with a degreeof pressure which maybe regulated by adjusting the wcightl l upon thelever l1. By raising the free end of the lever t1 and suspending it bymeans of the notched handle-bar engaging the stirrup 46 the feedmechanism may be temporarily thrown out of operation.

From the foregoing description, taken in connection with the drawingshereto annexed, the operation and advantages of my invention will bereadily understood.

The construction of my machine is very simple, and it may be easilymanipulated in the manner herein described to regulate the speed of thefeed mechanism.

Having thus described my invention, what I claim is- In a machine of theclass described, the combination of a vertical shaft, a frictionwheelmounted slidingly upon the same, a shaft havinga limited slidingmovement and carrying a friction-disk adapted to engage the saidfriction-wheel, a rock-shaft, and a weighted lever mounted upon thelatter and having a pawl engaging a sliding box in which one end of thedriving-shaft is mounted, substantially as and for the purpose setforth.

F. MCDONOITGII'.

Witnesses:

WM. II. Fniuvnuv, .T. E. IIORAN.

